The dimensions of this machine are as follows: Length, 35 feet; height, 17 feet; width, 9 feet; the weight, about 225,000 pounds; and the number of parts of which it is composed, approximately 50,000. The last three or four years have also witnessed an immense advance in the art of color printing. The magazine without an elaborate color cover, or perhaps colored illustrations, is now an exception, whereas it was the reverse not long ago. After satisfactory experiments it was ascertained by the writer that, with the inks properly prepared, and suitable plates to print from, colors could be printed almost simultaneously upon the paper, without mingling; in short that the supposed necessity, in much of the work done, of drying the sheets after the impression of each color on the paper, was not necessary for the production of a good quality of printing. Further experiments also proved the mechanical possibility of obtaining most accurate register in printing from a roll and that the number of impressions, or colors, could be increased to advantage. These various experiments resulted in the construction by Hoe & Co. of color presses which were almost simultaneously installed by the proprietors of the New York “Herald” and the New York “World,” who commenced the publication of colored supplements, upon a system which has been adopted by the papers in most of the large cities, and which they have never discontinued. The practicability of printing in colors has been so fully demonstrated that color attachments are being added to very many of the large newspaper presses throughout the country. The most extensive of the color presses, and the largest printing machine ever constructed, is the color press made by Hoe & Co. for the New York “Journal” and now used in printing portions of the Sunday editions of that paper, although others of approximate proportions and capacity have been made for the New York “World,” the New York “Herald,” the Chicago “Tribune,” the Boston “Post” and other newspapers. This machine gives as many as eleven separate impressions, or colors, on a single copy of the paper; that is, it will print in six colors on one side of the sheet and five on the other, or it may be arranged to print three colors on one side and six on the other, giving a speed of about 16,000 eight-page papers an hour, or at every revolution of the cylinders the equivalent of two perfect eight-page papers printed in colors. Four, six, eight, ten, twelve, fourteen, sixteen, twenty, twenty-four, twenty-eight or thirty-two-page papers may be printed on this machine, as required, from one, two or three double-width (or four-page-wide) rolls of paper. It will also produce magazine forms (with pages half the size of those of the regular issue of the paper) at from 16,000 to 24,000 an hour, either 16, 20, 24, 28, 32, 40 or 48 pages, delivered folded, cut, and automatically wire-stitched, with all the pages printed in colors or half-tones.